Chapter 3- Composition Of Cells Flashcards
Biological molecules contain what to make them organic?
Carbon
As well as oxygen, hydrogen, nitrogen and sulfur
Molecules can be grouped into five classes, what are these classes?
Carbohydrates, lipids, water, proteins, and nucleic acids
Water is important in cells, why?
It provides an environment suitable for metabolic reactions to take place and also acts as a solvent
Water participates and is a common product of many ?
Reactions
The ph scales measures what?
The concentration of hydrogen ions
What organic molecules make up carbohydrates?
Carbon, hydrogen, oxygen
C6 H12 O6
Lipid contains carbon hydrogen and oxygen but the proportion of what is much smaller than carbohydrates?
Oxygen
Lipids act in what way to water?
Hydrophobic, and are insoluble
Lipids classify into what? (S, P, S)
Simple- fats, oils and waxes, phosolipids, steroids
Nucleic acids are big molecules involved with what?
the transmission of inherited info, two main types are DNA and RNA
What are the three components of a nucleotide?
Phosphate group, sugar group (deoxyribose, ribose) base.
Proteins consists of many what?
Amino acids linked together.
What role do proteins have in the body? (ESSTD)
Enzyme reactions, structure, storage, transport and defence.
What are enzymes makes up of?
Proteins
What do enzymes do?
Speed up a chemical reactions
